Clutch



May 5, 1942- H. J. NICHOLS ETAL 2,282,084

CLUTCH original' Filed-Aug. 17, 194C ,5 Y www E wom M Ewa o WMM n IJM .A YL. mm HE H Patented May 5, 1942 CLUTCH Harry J. Nichols, Point Pleasant, N. J.,

L. Tholstrup, Binghamton, International Business Machines and Henry N. Y., assignors to Corporation,

New York, N. Y., a corporation of New York Original application August 17, 1940, Serial No. 353,113. Divided and this application June 14,

1.941, Serial N0. 398,070.

2` Claims.

Thepresent invention is a division of the copending application of H. J. Nichols and l-I. L. Tholstrup, Serial No. 353,113, led August 17, 1940 and comprises novel start-stop and single revolution clutch mechanism particularly adapted for use in the system as disclosed in said copending application.

One of the objects of the present invention is to provide a novel clutch for operation of the start-stop mechanism of the type employed at the sending and receiving stations of a system, as disclosed in said copending applic-ation.

Another object is to provide a novel clutch for operation of start-stop mechanism, which will be simple, compact and highly ecient.

Other objects ofthe invention will be pointed out in the following description and claims and illustrated in the accompanying drawing which discloses, by Way of example, the principles of the invention and the best mode which has been contemplated of applying that principle.

In the drawing:

Fig. 1 is a side elevation, in section, of the novel start-stop single revolution clutch mechanism of the invention, and including transmitting and receiving cams, a latch contact operating cam, and a circuit breaker cam, as employed in the system of said copending application.

Fig. 2 is a perspective view illustrating the construction of the spider of the clutch mechanism.

Fig. 3 is a partial sectional view illustrating the position of the clutch driving pins, with relation to the spider and the driving cup, when the clutch is disengaged.

Fig. 4 is a partial sectional view illustrating 3' the clutch controlling disk mounted on the spider, and the manner in which the controlling disk actuates the clutch driving pins to the disengaged position of Fig. 3.

Fig. 5 is a view, similar to Fig. 4, but with the controlling disk advancing the driving pins to their engaged position.

Fig. 6 is a View, similar to Fig. 3, but with the driving pins in the engaged or locked position of Fig. 5.

Fig. 7 is a sectional view illustrating the latch contact operating cam, the controlling disk and the accelerating spring in position.

Fig. 8 is a sectional view of the latch contact operating cam. hub and the clutch spiderI and the detent pawl for holding the parts. in stopped position.

Fig. 9 is a diagrammatic view illustrating the coaction of the start-stop magnet, start-stop' magnet armature and the stop pin of the clutch controlling disk.

Figs. 9a, 9b and 9c are diagrammatic views illustrating the relative positions of the stop pin and start-stop armature under different operating conditions.

Referring to the drawing wherein like reference vcharacters refer to like parts throughout the several views, the clutch mechanism is shown as comprising generally an over-riding roller type clutch in which six small pins or rollers |00 coact with a spider |0| and a pair of driver cups |02 and are engaged by means of a Wedge action to produce a positive drive.l After the clutch has been engaged, it continues to rotate, locked in step with the shaft 88 by means of cups |02, un-

v til the pawl 95a, for example, of stop arm 95 engages the stop pin 06. The engagement of the stop pin and pawl arrests the motion of a controller disk 91 to which the pin is attached While the energy of the other parts of the clutch causes the clutch to rotate through a small angle which disengages the rollers |00 and thus releases the clutch.

Referring to Fig. l, the complete clutch mechanism 94 is illustrated as comprising the pair of driver cups |02 fastened to shaft 88 by means such as set screws |025'. Each cup comprises a cylindrical member, bored to fit the shaft 88 and provided with a counterbored portion |0261; turned concentric with shaft 88, the interior surface of the counterbores constituting the drive surfaces of the clutch. Located between the pair of driver cups is the spider I0| (Fig. 2) mounted on and in loose contact with the shaft 08 and extending at its ends into the interior of the counterbored portions of the cups. The rollers |00 are mounted in axially extending slots or grooves |013 (Fig. 2) formed in the outer periphery of the spider and the ends of the rollers are so positioned as to contact the interior surfaces of the respective counterbores |0201) of the respective cups When the clutch is engaged. As is seen in Figs. 2 and 3, the slots |0|s are formed eccentrically with respect to the shaft 88 so that motion of the rollers |00 along the bottom of the slots or grooves, moves the rollers farther from the center line of the shaft or closer thereto in accordance with the direction of motion, so that the rollers are either thereby engaged or disengaged from the driver cups |02. The driving rollers |00 are jointly controlled by an interiorly toothed controller disk or ring 91 (Fig. 4) which ring is rotatably mounted in a radially extending groove |0|g (Fig. 2) formed in the spider |0| and is provided with a torque spring |03 (Fig. 7) having one end inserted into an axially extending opening 91a in the controller ring 91 and the other end inserted into an axially extending opening |0460 in the latch contact operating cam |04. The spring |03, upon release of the controller ring 91, tends to rotate the controller ring so that the rollers are urged towards the engaging position (Fig. 6). The spider |0| is in frictional engagement with a fiber pad (Fig. 1) at each end thereof which in turn is urged into engagement with the rollers by a cup-shaped spring washer |06 bearing on the bottom of the counterbores |0201) of the cups |02, respectively, so that a force is always exerted upon the rollers by the rotation of the driver cupsto aid in positioning the pins in the engaged position. By

adjustment of the position of the cups on the i shaft 83, the irictional force on the spider may be varied. A notch or axially extending slot |01 (Fig. 2) is formed in the cuter edge of one of the radailly extending members |0|r of the spider and a driving key |03 (Fig. 8) fastens the transmitting cam TC, latch contact operating cam |04 (Fig. l), circuit breaker cam |09 and receive cam RC to the spider |0| for rotation therewith upon release of the controller ring 91 and engagement of the clutch.

As illustrated in Figs. 4 and 5, the controller ring is provided with a stop pin 96 cooperating with the pawls 95a and 951) on the arm 95 (Fig. 9) controlled by the armature SSMA of the start-stop magnet SSM. Engagement of the pin 90 with either the pawl 95a or 951), holds the controller ring 91 in position, against the force of the torque exerting spring |03, so that the rollers i0@ are held, out of the interlocking engagement7 between the rollers, the driver cups and the spider. This condition is illustrated in Figs. 3 and 4, the stop arm 95 being schematically illustrated as engaging the stop pin 95. The teeth 911i (Fig. 4) of the controller ring 91 hold the rollers |00 in the position, as shown in Fig. 3 so that the rollers are located in the deepest part of the slots |0|s of the spider and the rollers are therefore out of engagement with the peripheries of counterbores |0201), respectively. Upon. release of the stop pin 96, as illustrated diagrammatically in Fig. 5, the controller ring 91 is rotated by spring |03. Simultaneously, the friction due to washer |05 (Fig. 1) and cup shaped spring washer |06 tends to rotate the spider i0! in the direction of rotation of the clutch.

In order to obtain positive and rapid engagement of the driving pins, by the ring or controller disk 91, to lock the driving cups to the spider, the controller ring not only must be accelerated by the accelerating spring |03, as just described, but the spider must be held stationary in the meantime. As is seen in Fig. 8, the hub |040, of cam |04 is provided with a V-notch H01) into which projects the V-shaped end H901 of the detent lever ||0. Since the spider |0| is connected to cam |04 by key |08 (Fig. 8) the lever |10 holds the spider stationary when the clutch is disengaged. Therefore, although the friction of members |05 and |00 tend to rotate the spider, as above stated, the detent lever holds the spider against such immediate rotation. The spring |03, therefore, snaps the ring 91 into rotation and the ring or controller disk teeth 91t quickly assume the position, as shown in Fig. 6, to thereby move the pins |00 into the shallow parts of the groove |0|s so that the rollers engage the surfaces of the counterbores |0201) formed in the cups |02 and the clutch is rotated. Upon the engagement of pin at the end of a revolution of the clutch, the ring 91 is arrested and the momentum of the other parts of the clutch rotates the spider until lever ||0 engages the notch H01) so that the spider assumes the position of Fig. 3, the rotation of cam |04, with respect to ring 91, before it is stopped by lever H0, thereby placing a stress on spring |03, to condition the same for the next cycle of operation.

The complete operation of the novel start-stop single revolution clutch mechanism is as follows: Responding to a spacing line condition produced as described 4in said copending application Serial No. 353,113, the start-stop magnet SSM (Fig. 9) is deenergized and the 'spring 95s moves the armature SSMA away from the magnet SSM and thereby rotates the stop arm 95 counterclockwise to theY position shown in Fig. 9a so that the pawl 951) is moved out of the path of rotation of the pin 913 and pawl 95a is moved into the path of rotation of this pin thereby stopping the clutch in the preliminary stop position upon the engagement of pin 96 and pawl 95a. This is the position of the clutch when the system is deenergized and is not in use.

Upon depression of the send-receive key, as described in said copending application Serial No. 353,113, the line is energized, thereby energizing a start-stop magnet such as SSM. The armature SSMA of SSM is thereby attracted, so that arm 95 is rotated clockwise against the force of spring 95s to the position, as shown in Fig. 91), and the pawl 951) is rotated into position to intercept the stop pin 96 so that the clutch is arrested in the normal stop position.

VBlow, upon transmission of the normal start or spacing line condition, which is a deenergized condition, magnet SSM is deenergized and the arm 95 is rotated counterclockwise to the position, as shown in Fig. 9c. As is clearly illustrated in the diagrammatic illustration of Fig. 9c, this release will permit the pin 96 to clear both of the pawls 95a and 951) and such release of pin 96 permits ring 91 under control of spring |03, as described above, to move the rollers into engagement with the cups to rotate clutch 91| until either the pawl 95a is engaged, at the preliminary stop position before the completion of a full revolution, as shown in Fig. 9a, or until pawl 951) is engaged, as shown in Fig. 91), which occurs at the end of one complete revolution during normal operation because a stop or marking line condition, which is an energized condition, is transmitted as the last signal, component of a complete signal which stop signal energizes magnet SSM to attract armature SSMA to rotate arm 95 to the position, as shown in Fig. 9. Such engagement of pin 96 stops the clutch and resets spring |03, as described above.

Novel start-stop clutch and single revolution producing means are therefore provided, which find particular utility in a system, such as disclosed in said copending application Serial No. 353,113.

While there has been shown and described and pointed out the fundamental novel features of the invention as applied to a single embodiment, it will be understood that various omissions and substitutions and changes in the form and details of the device illustrated and in its operation may be made by those skilled in the art, without departing from the spirit of the invention. It is the intention, therefore, to be limited only as indicated by the scope of the following claims.

What is claimed is: 1. In a device of the character described, a

shaft, a start-stop clutch driven by said shaft 5 and including a hollow cylindrical member mounted on said shaft for movement with respect thereto, a pair of counterbored members, axially disposed at opposite ends of said first member and connected to said shaft for rotation i therewith, said counterbores being aligned in an axial direction, a plurality of power transmitting members carried by said iirst member and extending into said axially disposed counterbores, resilient means between each of said counteri bored members and said power transmitting members, a second hollow cylindrical member surrounding a portion of said power transmitting elements, and means controlled by said second member for moving said power transmitting g members into and out of engagement with the inner periphery of said counterbored members. 2. In a device of the character described, a shaft, a member mounted on said shaft, a plurality of axial slots formed in said member, the bottom walls of said slots being, respectively, eccentrically oriented with respect to said shaft, a plurality of pins disposed in said axial slots, respectively, a pair of counterbored members connected to said shaft and axially disposed on opposite ends of said slotted member, a hollow member surrounding said pins and slotted member, means for resiliently biasing said hollow member into rotation, movable stop means, means for moving said stop means into engaging and disengaging position, means on said hollow member cooperating with said stop means to retain said member against rotation by said biasing means upon engagement of said means and said stop means, and means on said hollow member moving said pins simultaneously, into locking engagement with said eccentrically located bottom walls upon disengagement of said means and stop means and consequent operation of said resilient means.

HARRY J. NICHOLS. HENRY L. THOLSTRUP. 

